The molecular origin of the action of helicases is explored, starting with a model built based on the different X-ray structures of the large tumor antigen (LTag) hexameric helicase and a simplified model containing the ionized phosphate backbones of a single-strand DNA. The coupling between the protein structural changes and the translocation process is quantified using an effective electrosta...

The objectives of this paper are to review the modeling and design of concrete frame structures for the changing member-temperature loading case and the section gradient-temperature loading case. In addition, the intensity distribution of internal forces resulting from temperature changes and the factors that cause a decrease or increase in these forces was studied. When the temperature of an o...

Under the action of externally-applied magnetic fields, a portion of magnetic particles was condensed out from the initially monodispersed magnetic fluid and formed into magnetic chains or columns, depending on the direction of the applied fields. These chains or columns evolved from a disordered phase to an ordered structural pattern as the field strength reached some critical value. It was fu...

Abstract The aim of this study is to investigate the effect soil type on buildings experiencing floor-to-column pounding during earthquakes. Five with 4-storeys, 6-storeys, and 7-storeys were considered. Three types 4-storey building different total heights taken into account which leads at 1/3, 1/2 2/3 height impacted column. Two scenarios considered, i.e. between 6-storey (three cases when co...

We report on a simulation study of the performance of the North Tower (WTC-I) of the World Trade Center complex during the impact of American Airline Flight 11, on September 11, 2001. We discuss impact damage the structural core might have sustained and its possible behavior under structural and thermal loading. Our simulations indicate that the worst damage to the core structure was in stories...

Modular structural systems are constructed using a method that they are assembled with prefabricated unit modular frames on-site. This provides a benefit that can significantly reduce building construction time. The structural design is usually carried out under the assumption that their load-carrying mechanism is similar to that of traditional steel moment-resisting systems. However, both syst...

0020-7683/$ see front matter 2013 Elsevier Ltd. A http://dx.doi.org/10.1016/j.ijsolstr.2013.03.018 ⇑ Corresponding authors. Tel.: +1 608 346 7275 (L. Don E-mail addresses: [email protected] (L. (R. Lakes). High structural damping combined with high stiffness is achieved by negative stiffness elements. Negative incremental structural stiffness occurs when a column with flat ends is subjecte...